Where's proof that Oracle VM outperforms the competition?

Instead of certifying its applications to run on VMware, in November 2007, Oracle Corp. released its own hypervisor and virtualization management software, Oracle VM. But somehow the company can't provide comparative data or users to back up its performance claims.

Theoretically, putting Oracle database applications on virtual machines (VMs) is desirable, because it can translate into hardware cost reduction, power savings, greater flexibility and high availability.